philphotog wrote:
Hi there.
I have two yongnuo flash units using 4xAA batteries. However, the manufacturers also market an external power pack which carries eight AA standard or AA rechargeable batteries connecting to the flash body via cable. The pack can be worn on the belt or suspended round the neck. I think it can be added to the baseplate of the camera but, I feel, this makes the camera/combination too heavy. Hope this helps.
The model I have 568 does not have an external port for power...